Patent BR-8303861-A (BR)
Inventor: LANDLER JOSEF
IPC: B32B27/32
Filed: 1983-07-19
Abstract: Foils which are opt. foam-backed on one side, are (1) built up of 2 or more laminated layers of deep-drawable, unfoamed composite foils of thickness 500-1400(600-1200) microns. The composite foils contain (2) 1 or more plasticiser-free or -deficient bottom foils of (2.1) mixts. of PVC, acrylonitrile- butadiene-styrene copolymers (ABS) as well as a plasticising polar gp.-contg. high polymer (A), having mol. wt. over 10000 (over 30000) and which forms a phase or is miscible with PVC, or of (2.2) mixts. of PVC and ABS contg. over 40(50)wt.% (w.r.t. resin mixt. for bottom foil) of PVC-ABS, with another resin, esp. an acrylonitrile copolymer, or a mixt., as well as a plasticising polymer of type (A). - A plasticiser-free or -deficient top foil (3) is used, having thickness 100-500(120-200) microns, consisting of (3.2.2) mixts. of PVC with another resin, esp. an acrylonitrile copolymer, or a mixt., as well as a plasticising polymer of type (A).S The foils and articles or article pts. are used in car-interiors and aeroplanes, e.g. as instrument panels, safety covers, side-walls, etc. The foils or articles have low fog-values, i.e. low migration on plastic on heating higher flexibility, cold-flexibility, flow- or deep-drawing behaviour, retarded crack-formation and lower rigidity. (0/5) EPAB- EP--99455 B Composite sheets, capable of being deep drawn, of polyvinyl chloride, or of mixtures of acrylonitrile-butadiene styrene copolymers (ABS) with polyvinyl chloride and if required an additional content of fillers, processing additives and/or agents for imparting flame resistance, in which the sheets are foam-backed if required on one side, characterised in that the unfoamed composite sheets, capable of being deep drawn, have a thickness of 500 microns-1,400 microns, are laminated and are composed in the form of two layers or a plurality of layers, which include at least a lower sheet which is free of primary or liquid softeners or which has up to less than 3% by weight primary of liquid softeners, which lower sheet consists of a mixture of polyvinyl chloride or vinyl chloride copolymers with up to 20% by weight olefinically unsaturated monomers, acrylonitrile-butadiene-st yrene copolymers (ABS) and a plasticiser on the basis of a plasticising high polymer with polar groups, which has a molecular weight of greater than 10,000 and forms a phase with polyvinyl chloride or is compatible with polyvinyl chloride or consists of a mixture of a) polyvinyl chloride or vinyl chloride copolymers with up to 20% by weight olefinically unsaturated monomers and b) acrylonitrile butadiene-styrene copolymers (ABS) with a PVC-ABS content of more than 40% by weight (in relation to 100 parts by weight of the synthetic resin mixture for the lower sheet), with c) an acrylonitrile copolymer or a synthetic resin mixture on the basis of acrylonitrile copolymer and d) a plasticiser on the basis of a plasticising high polymer with polar groups, which has a molecular weight of greater than 10,000 and forms a phase with polyvinyl chloride or is compatible with polyvinyl chloride, and include an upper sheet which is free of primary or liquid softeners or which contains up to less than 3% by weight primary or liquid softeners with a thickness of 100-500 microns, which consists of polyvinyl chloride or - EP--99455 B Composite sheets, capable of being deep drawn, of polyvinyl chloride, or of mixtures of acrylonitrile-butadiene styrene copolymers (ABS) with polyvinyl chloride and if required an additional content of fillers, processing additives and/or agents for imparting flameresistance, in which the sheets are foam-backed if required on one side, characterised in that the unfoamed composite sheets, capable of being deep drawn, have a thickness of 500 microns-1,400 microns, are laminated and are composed in the form of two layers or a plurality of layers, which include at least a lower sheet which is free of primary or liquid softeners or which has up to less than 3% by weight primary of liquid softeners, which lower sheet consists of a mixture of polyvinyl chloride or vinyl chloride copolymers with up to 20% by weight olefinically unsaturated monomers, acrylonitrile-butadiene-styrene copolymers (ABS) and a plasticiser on the basis of a plasticising high polymer with polar groups, which has a molecular weight of greater than 10,000 and forms a phase with polyvinyl chloride or is compatible with polyvinyl chloride or consists of a mixture of a) polyvinyl chloride or vinyl chloride copolymers with up to 20% by weight olefinically unsaturated monomers and b) acrylonitrile butadiene-styrene copolymers (ABS) with a PVC-ABS content of more than 40% by weight (in relation to 100 parts by weight of the synthetic resin mixture for the lower sheet), with c) an acrylonitrile copolymer or a synthetic resin mixture on the basis of acrylonitrile copolymer and d) a plasticiser on the basis of a plasticising high polymer with polar groups, which has a molecular weight of greater than 10,000 and forms a phase with polyvinyl chloride or is compatible with polyvinyl chloride, and include an upper sheet which is free of primary or liquid softeners or which contains up to less than 3% by weight primary or liquid softeners with a thickness of 100-500 microns, which consists of polyvinyl chloride or